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    Portable Hydrogen (H2) Gas Detector, 0 to 500/1000/2000 ppm

    4.9 out of 5 based on 35 reviews | Write a review
    Portable hydrogen (H2) gas detector draws the gas sample by a micro pump, with high accuracy and reliability, measurement ranging from 0 to 500ppm, 1000ppm, 2000ppm, 5000ppm for your choice. Real-time LCD display, audible, visual & vibrating alarm, durable and compact design, easy to carry and operate. High precision H2 detector with measuring range 0-10ppm (0.001ppm) is also available.
    SKU: GD200-H2
    Availability: In stock
    30-day Returns
    Free Shipping
    Delivery date: 2-12 days


    • LCD dot matrix display, direct readout of gas type, unit, concentration, local time, etc.
    • Support English/Chinese operation, easy to shift.
    • Gas concentration unit PPM and mg/m3 can be shift quickly.
    • Built-in micro-sampling pump, 10 grades of suction are available.
    • Explosion-proof certification

    Gas Detector Functions

    • With self-calibration and zero calibration functions, makes the detection more accurate and reliable.
    • One key to restore factory setting, free from maloperation.
    • With temperature and pressure compensation, able to realize the compensation for the gas concentration under different temperature and pressure environments.
    • Two-stage alarm with sound and light, and alarm point is settable.
    • Rechargeable lithiumpolymer battery with large capacity.
    • High-strength special engineering plastic housing, with anti-slip, waterproof, dustproof and explosion-proof.


    Model GD200-H2
    Sampling Method Pump type, flow rate can be up to 750ml/min
    Gas Hydrogen (H2)
    Range (Optional) * 0 to 10 ppm, 0 to 500 ppm, 0 to 1000 ppm, 0 to 2000 ppm, 0 to 5000 ppm, 0 to 10000 ppm, 0 to 100% LEL, 0 to 4% VOL
    Resolution 0.001ppm (0-10ppm), 0.01ppm (0-100ppm), 0.1ppm (0-500ppm), 1ppm (0-1000/2000/5000/10000ppm) or 0.001% (0-4% VOL)
    Accuracy ≤±3% F.S.
    Responce Time ≤10s
    Repeatability ≤±1%
    Recovery Time ≤10s
    Linearity Error ≤±1%
    Zero Shift ≤±1% (F.S./year)
    Data Logging (Optional Function) High speed data transmission by USB, available for data downloading and printing (The built-in IC card has about 2G memory, which can record 100,000 sets of data.)
    Alarms Sound, light and vibration
    Display LCD dot matrix display
    Language Chinese/English
    Battery 3.7V rechargeable lithium battery, 3.7 Watt
    (Charger included: Input AC 100-240V 50/60Hz with optional USA, Europe or UK plug)
    Operating Time 100h (Pump off)
    Communication Mini USB interface supports standard MODBUS communication protocol
    Explosion-proof Grade Ex ia llC T4
    Case Material ABS+PC
    Protection Grade IP66
    Certification CE, ATEX
    Operating Temperature -20℃~50℃
    Operating Humidity 0~95%RH (non-condensing)
    Operating Pressure 0.8~1.2bar
    Dimension 205*75*32mm
    Weight 300g
    Warranty 12 months
    Extension Probe About 480mm (Total Length), About 300mm (Probe Head)
    Accessories (Optional) Calibration kit - gas pressure regulator (calibration gas cylinder NOT included)
    • Body Material: Brass
    • Max. Input Pressure: ≤15MPa
    • Max. Output Pressure: 0.25MPa
    • Flowmeter Range: 0.1-1.5 L/min
    • Mounting Connection: Inlet port: W21.8-14; Outlet port: Ф6 flexible tube


    * If you need a H2 gas detector with other measuring ranges unlisted in above table, please contact us to inform your operating environment, so as to help you choose an appropriate one for your application.
    * We also provide other common gas detectors, and you can refer to ATO Gas Detector Catalog to get the specific gas type and measurement range. If you have any questions, please feel free to contact us.

    *** Other Common Gases and Ranges Available for Portable Gas Detectors

    Gas Type Measure Range Resolution
    Ammonia (NH3) 0-10/20/50/100/200/500/1000/2000/5000ppm 0.01ppm/0.1ppm/1ppm
    Benzene (C6H6) 0-1/5/10/20/50/100/200/500/1000/2000/5000ppm 0.001ppm/0.01ppm/0.1ppm/1ppm
    Carbon Dioxide (CO2) 0-1000/2000/5000/10000/20000/50000 ppm, 0-10%/20%/30%/50%/100%VOL 1ppm, 0.01%VOL
    Carbon Monoxide (CO) 0-10/20/50/100/500/1000/2000ppm 0.001ppm/0.01ppm/1ppm
    Chlorine (Cl2) 0-5/10/20/50/100/200ppm 0.001ppm/0.01ppm/0.1ppm
    Chlorine Dioxide (ClO2) 0-10/20/50/100ppm 0.001ppm/0.01ppm/0.1ppm
    Ethylene (C2H4) 0-100%LEL 1%LEL
    Ethylene (C2H4) 0-10/20/50/100/500/1000/2000ppm 0.001ppm/0.01ppm/0.1ppm/1ppm
    Flammable 0-100%LEL 1%LEL
    Formaldehyde (CH2O) 0-10/20/50/100/500/1000ppm 0.01ppm/0.1ppm/1ppm
    HC 0-100%LEL 1%LEL
    Hydrogen (H2) 0-10/20/100/500/1000/2000/5000ppm, 0-1%/2%/4%VOL 0.001ppm/0.01ppm/1ppm, 0.001%VOL
    Hydrogen Chloride (HCL) 0-10/20/50/100/200/500/1000/2000ppm 0.01ppm/0.1ppm/1ppm
    Hydrogen Cyanide (HCN) 0-10/20/50/100ppm 0.01ppm/0.1ppm
    Hydrogen Fluoride (HF) 0-1/5/10/50ppm 0.001ppm/0.01ppm
    Hydrogen Sulfide (H2S) 0-5/10/20/50/100/200/500/1000/2000ppm 0.001ppm/0.01ppm/0.1ppm/1ppm
    Methane (CH4) 0-100%LEL, 0-50%/100%VOL 1%LEL, 0.01%VOL
    Methyl Bromide (CH3Br) 0-1/10/20/50/100/200ppm 0.01ppm/0.1ppm/1ppm
    Nitric Oxide (NO) 0-20/50/100/250/500/1000ppm 0.01ppm/0.1ppm/1ppm
    Nitrogen (N2) 0-100% VOL 0.01%VOL
    Nitrogen Dioxide (NO2) 0-20/50/100/500/1000ppm 0.01ppm/0.1ppm/1ppm
    Oxygen (O2) 0-25%/30%/100%VOL 0.01%VOL
    Ozone (O3) 0-5/10/20/50/100/200/500/1000/2000ppm 0.001ppm/0.01ppm/0.1ppm/1ppm
    Phosgene (COCl2) 0-1/5/10ppm 0.001ppm
    Phosphine (PH3) 0-10/20/50/100/500/1000/2000/3000ppm 0.01ppm/0.1ppm/1ppm
    Sulfur Dioxide (SO2) 0-20/50/100/500/1000ppm 0.01ppm/0.1ppm/1ppm
    Sulfur Hexafluoride (SF6) 0-1000/2000/3000ppm 1ppm
    Volatile Organic Compounds (VOC) 0-1/5/10/20/50/100/200/500/1000/2000/5000ppm 0.001ppm/0.01ppm/0.1ppm/1ppm


    Portable Hydrogen (H2) Gas Detector Details


    Portable hydrogen gas leak detector with alarming is suitable to monitor the concentration of H2 in the chemical workshop, hydrogen bottle tank storage area, new energy reaserch and development, laboratory, automobile industry, glass industry, fuel cell industry, battery room and so on.

    Hydrogen H2 Gas Detector ApplicationsTips: Case Study - Portable Hydrogen (H2) Gas Detector for Fuel Cell Company

    A new energy company has been engaged in research and development, testing and production of various fuel cells for many years. The company has many hydrogen pipelines for the hydrogen (H2) is the main power source in the production process. To prevent the substandard process from the leakage of the hydrogen, the engineer made an inquiry about detecting the leakage of hydrogen to us.

    They needed a portable hydrogen detector to detect H2 leaks at the ports of each pipeline, record the detection value in real time and save a set of data every 2s recording interval. Furthermore, they also required transmitting the data to computer for the analysis.

    After the communication with the engineers based on their requirements, we recommended them a portable hydrogen (H2) gas detector ATO-GAS-H2, with measuring range of 0-1000ppm and resolution of 1ppm and also with data transmission and storage function.

    After using this H2 gas detector for a period of time, they were very satisfied with the detection results. The hydrogen gas detector not only is accurate in detection, fast in response time, but also real-time records the detecting value and save the data.

    Basic Settings of Portable Gas Detector

    This video will show you the basic settings of ATO portable gas detectors including high/low alarm setting, language setting and time setting.

    Calibration of Portable Gas Detector

    This video will show how to calibrate the ATO portable gas detectors.

    Concentration Detection of Pesticides Gas
    Methyl bromide is an organic compound with the chemical formula CH3Br, which is mainly used as a pesticide, fumigant, refrigerant and solvent, and can also be used in organic synthesis.This video will mainly use methyl bromide and CH3Br as examples to introduce the detection of their concentrations.

    How to Detect Hydrogen Sulfide Concentration in the Toilet
    Hydrogen sulfide is a flammable acidic gas that smells like rotten eggs at low concentrations and is very toxic. In actual operation, it is necessary to ensure that the detection equipment or method used can accurately measure the concentration of hydrogen sulfide, and pay attention to safety issues during operation to avoid hydrogen sulfide poisoning.

    How much C2H4 (ethylene) do ripe bananas and apples produce?
    We have various gas detectors such as: CO, O2, O3, H2, NH3, H2S, CH4, Cl2, CH2O, etc, from 0~10000ppm, Industrial or daily use.

    Existing reviews of Portable Hydrogen (H2) Gas Detector, 0 to 500/1000/2000 ppm
    Is It Capable of Soil Gas Measurements?

    I want to do soil gas field measurements and I'm looking for a portable gas detector, which tells me the exact amount of gases present at certain depth up to between 60 cm and 1m. Is your product able to manage these field conditions for these types of measurements and is it included with a probe that can be attached to the end of the flexible tube or there is no probe needed at all?
    Thank you in advance!
    From: Krisztofer | Date: 18/05/2024
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Our detector has a metal probe accessory, but it cannot be inserted directly into the soil as the soil will block the air inlet, making it impossible to measure. It is recommended to try the following:
    1. Fill a sampling bag with some soil and insert the instrument into the bag to detect the gas;
    2. Drilling enough holes in the body of a piece of water pipe or a long enough sampling tube and burying it in the soil to become a deep tube with many holes for sampling, and then sticking the metal probe into the tube to measure the gas.
    Inquire a few things about the portable H2 Gas Monitor
    I am writing to inquire a few things about the portable H2 Gas Monitor. Does the sensor have any cross interference with any other gases? Also, does it require daily bump tests?
    From: Don Benson | Date: 24/03/2024
    Was this review helpful? Yes No (0/0)
    ATO Responded
    CO and H2 interfere with each other. If CO increases in the measurement environment, the measurement reading will also increase.
    I'm a bit unclear with my question
    Great to hear this device can function in an oxygen background. This device states it has a built-in micro-sampling pump with "10 grades of suction available". Can you provide any further detail on what those different grades mean?
    From: Kim | Date: 05/02/2024
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The stable flow rate is 500-750ml/min, and the adjustment is within this range.
    Choosing the Right Portable Hydrogen (H2) Gas Detector
    I want to use the detector in a laboratory-scale application. In a small closed system producing approximately 1-10 mmol of H2 per hour, which portable gas detector should I prefer for hydrogen production? I want a simpler way to determine the concentration rather than using a gas chromatography system with a TCD detector. Thank you.
    From: Sinem | Date: 08/12/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    You need to calculate the total amount of H2 released, for example, if you have produced H2 for 1 hour, then you can use 0~10000ppm specification H2 detector (10mmol=10000ppm). If you have accumulated H2 for 4 hours, you need 0~40000ppm specification detector. In addition you have to tell us the temperature and humidity of your testing environment, other information you need to know, please contact us before sales.
    Portable Hydrogen (H2) Gas Detector
    I see in the data sheet that recovery time is < 10 s. Does this mean that the device analyzes  /- every 10 seconds?
    Are temperatures lower than the indicated of -20oC detrimental for the device? We intend to measure around -35oC.
    We want to measure process streams. To me it’s not fully clear what and how the inlet of the device works. Could you please elaborate? Like, can we attach BSP connections to it? Additionally, where is the outlet valve?
    From: Mason | Date: 06/11/2023
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    ATO Responded
    1. No. Recovery time refers to the time it takes for the instrument to return to zero after measuring hydrogen.
    2. The temperature of -35°C is Not acceptable. Our instrument can only withstand -20°C at the lowest.
    3. The inlet of the device is the air inlet. The instrument has a built-in pump to pump the gas in for detection.
    What is the principle of measurement?
    What is the principle of measurement? We’ve already been in touch with several manufacturers but most of them indicate that measuring in this range with TCD is rather difficult and generally unreliable.
    In what gases and gas compositions can the device operate? We intend to measure in a stream what primarily consists of methane and carbon dioxide, but also contains smaller fractions of nitrogen and oxygen. As far as my knowledge goes, it does not contain any carbon monoxide.
    From: jacob | Date: 06/11/2023
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    ATO Responded
    1. The principle of measurement is the electrochemical principle.
    2. Can detect the gas you mentioned. Gases such as methane, nitrogen, oxygen, and carbon dioxide have no effect on detection.
    Questions on how your sensor functions
    I am trying to determine how the measured H2 concentration in ppm correlates to volume of gas present in the measured sample and environment measured. Thus, I have a couple questions on how your sensor functions.
    Do you have information on gas flow rates at different pump speeds in order to calculate the volume of gas being analyzed over time?
    Do you have H2 on/off rates for the sensor? By this I mean how long does it take the sensor to register H2 presence and how long does it take for the sensor to reset.
    Do you have any reference literature that would help understand the sensor capabilities?
    From: Mavis | Date: 16/10/2023
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    ATO Responded
    1. The sensor is an electrochemical sensor, and the flow rate of the pump is stable at 750ml/min and can Not be adjusted.
    2. The response speed of the sensor is T90<60S.
    3. Please refer to the attachment for the sensor instructions.
    Question about H2 detectors longer life battery
    What issues will I experience if I have to charge the unit while it is turned on? Do you have any H2 detectors that have a longer life battery?
    From: Nichaolas | Date: 05/09/2023
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    ATO Responded
    After a portable detector is fully charged, it can only be used for about 10 hours. We recommend that you charge the battery first, and then turn on the battery while charging when the battery has a certain amount of power (but you can’t use it like this frequently, otherwise the battery may be damaged). If you want continuous monitoring for a long time, we recommend you to buy a fixed gas detector, which can monitor continuously for 24 hours
    Can this gas detector detect the gas mixture?
    Can this unit detect a 5% hydrogen / 95% Nitrogen tracer gas mixture?
    From: irving | Date: 30/08/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, this unit can detect a 4% hydrogen / 95% Nitrogen tracer gas mixture.
    But please note: The detector you buy has a range of 0-1000ppm, which can be used to measure leaks, but do not exceed the range.
    What is the difference between the three measuring ranges?
    I wanted to know what is the difference between the measurement ranges 0-40,000 PPM, 0-4% volume and 0-100% LEL. Aren't these three ranges the same? For my application I need sensor to operate in air as a warning safety sensor. Which would be the correct range selection? Does the 0-100% LEL display a percentage value range from 0% to 100% on the screen?
    From: Loren | Date: 06/08/2023
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    ATO Responded
    1. 0-40000ppm, the display unit is ppm, and the maximum display is 40000ppm; 0-4%VOL, the display unit is %VOL, and the maximum display is 4%VOL;  0-100%LEL, the display unit is %LEL, and the maximum display is 100%LEL.
    2. 0-40000ppm and 0-4%VOL versions use electrochemical sensors; 0-100%LEL versions use catalytic combustion sensors.
    I want to detect hydrogen in an argon atmosphere
    I want to detect hydrogen in an argon atmosphere and need to put vacuum on the detector before transferring it into that environment. Would the vacuum harm the detector and the pump?
    From: Chean | Date: 01/08/2023
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    ATO Responded
    Yes, vacuum will harm the detector and the pump.
    If it is vacuumed in an antechamber could damage the detector?
    I want to know if it could damage the detector if it is vacuumed in an antechamber?
    From: Farrah | Date: 01/08/2023
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    ATO Responded
    Unfortunately, our detector can not detect vacuum environment.
    Can you tell me what the accuracy and repeatability for H₂ Gas Detector?
    We got a Hydrogen detector in 0-40,000ppm range.
    Can you tell me what the accuracy and repeatability for this unit is? Also, If we were wanting to use it to detect around 27,500ppm, how many calibration points should we have and at what concentrations?
    Also, is the calibration gas that used hydrogen mixed in air?
    From: brooke | Date: 10/05/2023
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    ATO Responded
    What is your order number?
    1. The accuracy of the detector is about 3% F.S, and the repeatability is 1%.
    2. One calibration point is enough. If you want to measure 27500ppm, you can use calibration gas between 25000-30000ppm for calibration.
    3. Yes, hydrogen in air is mixed, because the presence of oxygen is required to measure hydrogen.
    2 issues with portable hydrogen gas detector
    The first issue is that I am using a 400 ppm gas standard to do my set point calibration, the highest H2 level the meter detects varies form 46 ppm to 57 ppm. The concentration the meter detect is much lower then the one in my gas standard. The second issue I am having is that the manual SET VALUE does not allow me to go passed 166 ppm.
    From: Cboh | Date: 07/03/2023
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    ATO Responded
    1. Please confirm whether the unit of the meter is ppm or mg/m3. If it is mg/m3, it cannot be calibrated, and the unit must be set to ppm.
    2. If the unit of meter is ppm, please change it to 400ppm.
    Worth the cost
    We bought this portable detector to ensure the safety of our laboratory experiments with hydrogen gas. The detector becomes useful for examining the connections for potential leakage. So far, I can say that it is fairly straightforward to handle and operate. Also, shipping to Canada was fast.
    From: Ali | Date: 17/10/2022
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    10% CO2 and 5% O2 environment could interfere with the readings on the detector?
    Hi, I wanted to know if a 10% CO2 and 5% O2 environment or a temperature around 37C could interfere with the readings on the detector.
    From: Barrel | Date: 11/08/2022
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    ATO Responded
    What is the hydrogen concentration? It can be used normally in environments where the concentration of hydrogen does not exceed 4%.
    Two questions about this H2 gas detetor
    Is there any gas that can interfere with Hydrogen detection? My expectation is that there is only H2 in the stream with probably some moisture and a minor amount of HI (vapor phase). Another question is: Do you have an oxygen detector that can measure the concentration of O2 (oxygen gas) in a stream composed from Nitrogen and a minor amount of water vapor?
    From: Teekay | Date: 02/08/2022
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    ATO Responded
    Unfortunately, the concentration of O2 is only 0.1%, which cannot be detected by our O2 detector. In addition, our H2 gas detector can only detect up to 4% H2, and 90% concentration has exceeded the measuring range of the detector.
    Best gas detector I have ever bought
    This sensor has amazing accuracy. recommended for anyone
    From: Carter | Date: 18/07/2022
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    Replace hydrogen detectors
    Is it possible to return these units in exchange for some 0-100% LEL units. I would be willing to return the 2 0-500 ppm units ($876.93/ea) for 4 of the 0-100% LEL units (423.08/ea). The only this I have done with the units I received is to charge them.

    If these 4 units work well in my applications, I will likely be purchasing 4 more.

    Thanks for the update. In fact, these three ranges 0-100%LEL, 0-500ppm and 0-1000ppm can all measure H2 leakage.
    From: Jon | Date: 26/05/2022
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    ATO Responded
    In the application environment with people, we generally recommend choosing 0-500ppm or 0-1000ppm; In the application environment without people, we recommend choosing the 0-100% LEL range. Therefore, the 0-500ppm you are currently using can also be used normally and does not need to be replaced. You could check whether the reading actually measured by this H2 gas detector is normal.
    High accuracy hydrogen gas detector
    This portable hydrogen gas detector with high accuracy and reliability. I'm very satisfied with real time LCD display. I would buy again and recommend this product to my friend.
    From: Dolly | Date: 20/04/2022
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    Highly sensitive H2 gas detector
    The sensitivity of this detector is higher than I imagined. As long as a little gas leaks out, it can be detected immediately. We have bought more than 10 units. Our gas company can use it for emergency repairs and security inspections. The point is The hydrogen gas detector is also very convenient to carry!
    From: Miguel | Date: 12/04/2022
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    Measurement of portable hydrogen gas detector
    Does your portable hydrogen gas detector measure %volume or %lel?
    From: Carranza | Date: 08/12/2021
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    ATO Responded
    It measures 0-100%VOL.
    Learning more about the Portable Hydrogen (H2) Gas Detector
    Hello. We are interested in learning more about the Portable Hydrogen (H2) Gas Detector, 0 to 500/1000/2000 ppm unit. Given that this unit was designed for pure hydrogen, what are the anticipated effects if it’s exposed to hydrogen-methane blends or hydrogen-natural gas blends? Appreciate any insights you can provide.
    From: Lutan | Date: 26/01/2021
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    ATO Responded
    Hi, Lutan, you're welcome. In this case, the measurement will be inaccurate, but the gas detector will not be damaged.
    I'm interested to order the hydrogen gas detector (0-500pm)...
    Hi. I'm interested to order the hydrogen gas detector (0-500pm) and therefore I got several questions.
    a) Could you explain how the detection is carried out during a measurement/pump cycle?
    b) What is the diameter of the air inlet of the portable detector system?
    From: Gauri | Date: 28/12/2020
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    ATO Responded
    Hi, Gauri. You're welcome.
    a) For the hydrogen gas detector, it has a built-in suction pump, so the gas inside the chamber will pass through the sensor continuously, and the gas concentration accurately appears on the display of the gas detector. At the same time, in order to avoid residues in the air chamber, the gas detector is designed with an air outlet.
    b) The diameter of the air inlet is 5mm.
    Hydrogen/methane detection
    Hello there.
    Since we only have a binary hydrogen/methane mixture and need to measure hydrogen, our thought was we could calibrate the unit using 100% methane as a zero or blank, and 100% hydrogen at the other end. The 2 gases have significantly different thermal conductivities, so as long your detector can provide accurate readings in such an environment, we can calculate the hydrogen vs. methane.
    From: John | Date: 16/12/2020
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    ATO Responded
    Hi, John. First of all, our Portable Hydrogen (H2) Gas Detector (0-to 100% VOL) is only suitable for measuring a single gas environment, so it does Not work in your case.
    Then, we recommend using 0-100%VOL methane (CH4) detector (the lower limit of methane detection is 1%VOL), which can be used in different environments, and after the CH4 value is detected, then the remaining gas hydrogen can be calculated.
    Suppose I want to operate your portable hydrogen detector while it is being charged.
    Hi. Suppose I want to operate your portable hydrogen detector while it is being charged. Can I do that? The reason is that we do not want the battery to be drained so that the reading is wrong.
    From: Herbert | Date: 07/12/2020
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    ATO Responded
    Hi, Herbert. We do not recommend operating the portable hydrogen detector while it is being charged, because it may cause unstable measurement. And our gas detector can generally be used for 20-30 hours after being fully charged.
    If you want to monitor the gas continuously for a long time (more than 24 hours), we recommend using the fixed gas detector.
    What is the frequency of calibration required for your H2 gas detector?
    Hi. What is the frequency of calibration required for your H2 gas detector?
    Can we do it locally? What is the cal gas you recommend?
    From: Sam | Date: 11/11/2020
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    ATO Responded
    Hi, Sam. For your questions, please check answers below.
    1. Once a year.
    2. Recommended gas for calibration is 1:1 hydrogen.
    3. Yes, of course. You can perform calibration locally, by sending it to a local laboratory or calibration company for calibration. And we can send you the calibration operation video for your reference.
    Can we buy the H2 gas sensor head separately if needed in the future?
    Can we buy the H2 gas sensor head separately if needed in the future?
    From: Eckhard | Date: 08/09/2020
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    ATO Responded
    Yes, you can but the price is approx 80% of the whole sensor price.
    What is the lowest detection range for your H2 Gas Detector with 0-500ppm?
    What is the lowest detection range for your H2 Gas Detector with 0-500ppm?
    From: Gavin | Date: 07/07/2020
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    ATO Responded
    Hi, Gavin. It can detect 2 ppm at least.
    A technical inquiry regarding your portable hydrogen gas detector (0-2000ppm)
    Hi. I have a technical inquiry regarding your portable hydrogen gas detector (0-2000ppm): what other gases can cause interference with the detection of hydrogen in this sensor? For example, we'd like to monitor hydrogen (0-2000ppm) in an exhaust gas stream that contains 73% N2, 12% O2, 10% H2O, 5% CO2, 2000ppm CH4, 500ppm CO, 500ppm NO and 750ppm NO2. Would the detector foul with these gases present?
    From: Scott | Date: 10/06/2020
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    ATO Responded
    Hello, Scott. In your case, CO will interfere with the H2 detection. If there is 500 ppm of CO in the environment, then even if no H2 exists, the H2 gas detector reading will show 2000ppm.
    Using H2 leak detector for refrigeration piping system
    Hi. We are a chiller manufacture and we currently use a 95-5 nitrogen-hydrogen gas mixture to pressurize and leak test our refrigeration piping systems. We use the H2 leak detector to find out the leaks and was curious if you had any experience using this equipment for that purpose?
    From: Jed | Date: 18/05/2020
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    ATO Responded
    Hi, Jed. You are welcome, but sorry to tell you, our portable hydrogen gas detector does not support H2 leaks test of refrigeration piping systems.
    Hydrogen gas detector 0-100%VOL
    Can we use your hydrogen gas detector to measure hydrogen in Air via selecting 0-100%VOL measuring range?
    From: Rob | Date: 20/04/2020
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    ATO Responded
    No, the range 0-100%VOL is usually used to measure the purity of H2 in a single gas, so it is not suitable for measuring H2 in an air mixture.
    Hydrogen gas detector
    Does your H2 gas detector continuously check the hydrogen leakage automatically or we need to check it manually?
    From: Joel | Date: 10/09/2019
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    ATO Responded
    This detector can continuously check the hydrogen leakage automatically.
    Inquiry for Hydrogen (H2) Gas Detector
    Can you provide H2 gas detector with lower detection range and high resolution 0.001 and high accuracy  /-2% full scale?
    From: Riley | Date: 05/08/2019
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    ATO Responded
    Yes, we can provide this H2 detector with the measuring range of 0-10ppm and the resolution of 0.001ppm.
    Portable and easy to operate, it is really helpful in my work.
    Bought this gas detector for work. It isn’t cheap, but works well. Portable and easy to operate, it is really helpful in my work.
    From: Noah S | Date: 19/07/2018
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    ATO Responded
    Dear Noah, thanks for your ordering and comment. To ensure the accuracy of the measurement, our gas detectors adopt the high-performance sensor so the cost is relatively higher. Good gas detector deserves this price.
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